A suburban Detroit airport worker who lived alone should spend the next 17 to 30 years behind bars for killing a 19-year-old woman who appeared on his doorstep early one morning last November, a judge said Wednesday.

Wayne County Circuit Judge Dana Hathaway handed down the sentence to Theodore Wafer after a jury convicted him on Aug. 7 of second-degree murder, manslaughter and using a firearm to commit a felony. The case had raised...